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curl

    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
    9:  *
   10:  * This software is licensed as described in the file COPYING, which
   11:  * you should have received as part of this distribution. The terms
   12:  * are also available at https://curl.haxx.se/docs/copyright.html.
   13:  *
   14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
   15:  * copies of the Software, and permit persons to whom the Software is
   16:  * furnished to do so, under the terms of the COPYING file.
   17:  *
   18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
   19:  * KIND, either express or implied.
   20:  *
   21:  ***************************************************************************/
   22: /* <DESC>
   23:  * Download a given URL into a local file named page.out.
   24:  * </DESC>
   25:  */
   26: #include <stdio.h>
   27: #include <stdlib.h>
   28: #include <unistd.h>
   29: 
   30: #include <curl/curl.h>
   31: 
   32: static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
   33: {
   34:   size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);
   35:   return written;
   36: }
   37: 
   38: int main(int argc, char *argv[])
   39: {
   40:   CURL *curl_handle;
   41:   static const char *pagefilename = "page.out";
   42:   FILE *pagefile;
   43: 
   44:   if(argc < 2) {
   45:     printf("Usage: %s <URL>\n", argv[0]);
   46:     return 1;
   47:   }
   48: 
   49:   curl_global_init(CURL_GLOBAL_ALL);
   50: 
   51:   /* init the curl session */
   52:   curl_handle = curl_easy_init();
   53: 
   54:   /* set URL to get here */
   55:   curl_easy_setopt(curl_handle, CURLOPT_URL, argv[1]);
   56: 
   57:   /* Switch on full protocol/debug output while testing */
   58:   curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);
   59: 
   60:   /* disable progress meter, set to 0L to enable it */
   61:   curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
   62: 
   63:   /* send all data to this function  */
   64:   curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
   65: 
   66:   /* open the file */
   67:   pagefile = fopen(pagefilename, "wb");
   68:   if(pagefile) {
   69: 
   70:     /* write the page body to this file handle */
   71:     curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);
   72: 
   73:     /* get it! */
   74:     curl_easy_perform(curl_handle);
   75: 
   76:     /* close the header file */
   77:     fclose(pagefile);
   78:   }
   79: 
   80:   /* cleanup curl stuff */
   81:   curl_easy_cleanup(curl_handle);
   82: 
   83:   curl_global_cleanup();
   84: 
   85:   return 0;
   86: }